If it is an acid then add a base until the pH level becomes 7, which is neutral. If it is a base, add acid until the pH is seven.
A base.
If the base is of the equivalent strength of the acid, yes.
add an acid
Yes it can.
An acid and a base. ;)
If you have a base an acid can neutralize it, giving water and a salt
Use an acid.
A base, a basic oxide as CaO and a saline hydride as NaH will neutralize an acid.
This is because the base can neutralize the acid faster than a base
Add it to a base!
a Salt
It is used to neutralize the stomach because alka seltzer is a acid and when a acid and base are used together they neutralize each other.